Betsy Arakawa died from hantavirus pulmonary syndrome, a rare rodent-spread disease with a mortality rate up to 50% in the American Southwest, officials said.

Betsy Arakawa — the classical pianist married to Gene Hackman — died last month of hantavirus pulmonary syndrome, a rare infectious disease linked to rodents, New Mexico authorities announced Friday.

An examination of the dog found dead along with actor Gene Hackman and his wife in their Santa Fe home shows dehydration and starvation were likely what led to the animal’s demise.